[Triple Trail Challenge presented by Tree Fort Bikes Triple Trail Challenge is an annual event for the PotoMBA Chapter, which is sponsored by Tree Fort Bikes. Fourty nine miles on Poto, Waterloo, and DTE trails of a non-competitive mountain bike ride on amazing singletrack, some of which is normally closed to bikes. Tree Fort Bikes brings to you the ultimate mountain biking experience in the region and it's a free event with free food and beer.]